How can i fix this weird halo

I'm using a free preset called Seasons and on some photos there's
a weird halo. How can I fix this? TIA 

I'm using a free preset called Seasons and on some photos there's
a weird halo. How can I fix this? TIA 
Looking at the screenshots, this is likely due to the pretty extensive HSL slider settings. There is an extreme desaturation of aqua combined with a huge hue shift that probably affects the background around the baby. Try disabling the HSL section in Develop (the little checkbox in the left top of the HSL panel) and see if the halo disappears. If so, I would experiment a bit with the sliders around the colors that are affected and see if some subtle movement of the sliders can get rid of this. This is pretty common for strong edits in the HSL panel.
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